Automatic Circuit/Reset Feature; Sensitivity Adjustment - ATP ZX-1A Heated Pentode Manuel De L'utilisateur

Automatic Circuit/Reset Feature

The unit features a patented Automatic Circuit and Reset function that set the unit to ignore
ambient concentrations of refrigerant.
Automatic Circuit - Upon initial power on and the completion of the warm-up, the unit automati-
cally sets itself to ignore the level of refrigerant present at the tip. Only a level, or concentration,
greater than this will cause an alarm.
CAUTION: Be aware that this feature will cause the unit to ignore any refrigerant present at the
probe tip after warm-up is completed, and therefore the unit should only be powered on and
allowed to warm-up in fresh air.
Reset Feature - Resetting the unit during operation performs a similar function; it programs the
circuit to ignore the level of refrigerant present at the tip.
Each time the key is pressed (and released), the unit sets its threshold for detection to a level
above the current concentration being detected. By moving closer to a large leak and pressing
each time a full detection is indicated, the user can 'home-in' on the source of the leak (higher
concentration).
Similarly, the unit can be moved to fresh air and reset for maximum sensitivity. Resetting the unit
with no refrigerant present (fresh air) causes any level above zero to be detected, i.e. sets the
unit to its maximum sensitivity in the chosen sensitivity level.
To reset the unit press the
Each time the key is pressed, the LEDs will briefly light in orange to provide a visual confir-
mation of the reset action.

Sensitivity Adjustment

The unit provides two levels of sensitivity. When the unit is switched on, it is set to the high sen-
sitivity position.
1. To change the sensitivity, press the
orange from top to bottom, providing a visual confirmation and indication that the unit is in
Low sensitivity mode.
2. To switch back to High Sensitivity, again press the
light in orange from bottom to top, providing a visual confirmation and indication that the unit
is in High sensitivity mode.
key.
key. When the key is pressed, the LEDs will light in
key. The LEDs will
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